Taxa: Nicotiana quadrivalvis, Nicotiana quadrivalvis var. bigelovii (Nicotiana bigelovii), Nicotiana quadrivalvis var. quadrivalvis (Nicotiana quadrivalvis var. multivalvis, Nicotiana bigelovii var. multivalvis, Nicotiana bigelovii var. quadrivalvis), Nicotiana quadrivalvis var. wallacei (Nicotiana bigelo
... (show all)vii var. wallacei)